| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 570-40** | (303) 570-4001 - (303) 570-4099 | 41 |
| (303) 570-41** | (303) 570-4100 - (303) 570-4195 | 42 |
| (303) 570-42** | (303) 570-4200 - (303) 570-4299 | 37 |
| (303) 570-43** | (303) 570-4305 - (303) 570-4399 | 39 |
| (303) 570-44** | (303) 570-4400 - (303) 570-4495 | 32 |
| (303) 570-45** | (303) 570-4501 - (303) 570-4598 | 36 |
| (303) 570-46** | (303) 570-4601 - (303) 570-4696 | 41 |
| (303) 570-47** | (303) 570-4700 - (303) 570-4796 | 41 |
| (303) 570-48** | (303) 570-4800 - (303) 570-4887 | 32 |
| (303) 570-49** | (303) 570-4906 - (303) 570-4997 | 37 |
US Phone Directory: (303) 570-4***
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